HP unified 850 + IMC UAM as a RADUIS and Portal server

As the Portal Access deviceis used Unified 850 controller.When Iwant to do port synchronize to check connection IMC UAM Portal to the Unified 850 throuh Portal protocol,IMCreportsthat it can notaccess device becose devicecan not be reached through telnet,although if wecheck the connectionin IMCdevicevieweverything worksfine. Also when we try to login guest user in portal web page, login fails with message: "Request to the device timed out".

What we can do? How to connect Unified 850 to IMC UAM Portal to authenticate guest user?